prodopsy # Postmortem: The Pitfalls of Direct PDF Printing in WPF Without PDF Rendering **Summary** An attempt to print PDF files directly to the default printer without utilizing a PDF reader failed. The developer tried using a temporary file approach and expected silent printing via the OS-default printer, but the PDF format couldn’t be processed natively … Read more
# Why is my Blazor EditForm not calling OnValidSubmit on /auth/register route? **Summary** The `EditForm`’s `OnValidSubmit` handler fails to execute due to the **Blazor component lacking interactivity**. Instead of leveraging Blazor’s event handling, the browser performs a classic HTML form submission via POST, bypassing client-side logic. **Root Cause** – The `/auth/register` route component (**Register.razor**) **wasn’t … Read more
# Postmortem: VBA Mail Lookup Failure Due to Unset Object Reference **Summary** A VBA automation script failed to attach Outlook email items when searching in secondary columns. The code successfully attached emails when matching IDs in Excel’s Column C, but threw “Object variable or With block variable not set” errors during fallback searches in Column … Read more
Why does my linked list node occupies 16 bytes yet malloc reports 24 bytes? Summary A developer implemented a linked list node (struct Node) in C using manual memory allocation. While sizeof(struct Node) returned 16 bytes, malloc_usable_size() reported 24 bytes for an allocated node. Additionally, observed memory addresses between consecutive nodes differed by 32 bytes. … Read more
# Postmortem: Beginner’s Dilemma – WordPress vs Custom PHP Development ### ## Summary A beginner developer encountered decision paralysis when choosing between WordPress and custom PHP development for web projects. This postmortem analyzes the trade-offs and contextual factors to guide appropriate technology selection during the learning phase. ### ## Root Cause – **Misalignment of project … Read more
# How to Properly Handle Parent and Child Theme CSS in WordPress Without Messy Overrides ### ## Summary – Child theme CSS overrides become messy due to parent theme complexity (multiple CSS files, inline styles) – Primary solution: Strategic dequeuing of parent CSS and rebuilding style hierarchy – Goal: Avoid specificity wars and `!important` overload … Read more
# VS Code Not Showing Hover Documentation for Java Annotations: Technical Postmortem ### ## Summary A Java developer using VS Code for Spring Boot experienced missing hover documentation (Javadoc) for common annotations like `@Entity`, `@Table`, and `@Data`. The project used JDK 17, Maven, Spring Boot, JPA/Hibernate, and Lombok. While compilation and autocomplete worked normally, annotation … Read more
# Tortoise ORM ReverseRelation “already specialized” Error Analysis ## Summary – An incorrectly typed `ReverseRelation` field causes Tortoise ORM to throw a “ReverseRelation is already specialized” error during static analysis. – The issue manifests in PyLance type-checking despite functioning at runtime. – Fix involves consistent type specialization using forward references in quotes. ## Root Cause … Read more
# Why Removing Mutexes Reduces Latency in Low-Contention Multithreaded Systems ## Summary A low-contention multithreaded application using mutexes exhibited higher-than-expected latency. Replacing mutexes with lighter synchronization mechanisms (like atomic operations) reduced latency despite minimal lock contention. This occurs because mutex operations incur non-negligible overhead even without blocking due to hardware/system-level interactions. ## Root Cause – … Read more
## Production Postmortem: Adaptive Candle Pattern Detection Failure in NinjaTrader ### Summary A trading strategy relying on rigid candle pattern detection thresholds experienced low detection rates and adaptability issues during live market volatility shifts. The static ratio-based approach failed to identify key patterns dynamically. ### Root Cause – **Fixed thresholds** insensitive to changing market conditions … Read more